Bored with another normal, inky evening, bats discover an open library window and fly in to enjoy the photocopier, water fountain, and especially the books and stories found there.
Sam, a shy but creative mouse who lives in a library, decides to write and illustrate his own stories which he places on the shelves with the other library books, but when children find the tales, they all want to meet the author.
When a big new yellow tractor arrives, Otis the friendly little tractor is cast away behind the barn, but when trouble occurs Otis is the only one who can help.